Electric vehicle controller power supply column welding structure

Abstract

The utility model discloses an electric vehicle controller power supply column welding structure which comprises an aluminum substrate and a power supply column, one end of the power supply column is fixedly connected with a welding ring, one side of the welding ring is recessed inwards to form a plurality of air guide grooves, the air guide grooves are arranged on one side of the welding ring in a staggered mode, exhaust holes are arranged on the welding ring, and the aluminum substrate is fixedly connected with the power supply column. The welding ring and the aluminum substrate are connected through welding paste in a welding mode, and gas evaporated in the welding paste in the reflow soldering process can be exhausted in time by changing the shape of the welding face of the welding ring on the power source column, so that the voidage is reduced, the welding quality of the power source column and the aluminum substrate is greatly improved, the power source column and the aluminum substrate are integrated, and the welding quality of the power source column and the aluminum substrate is improved. Finally, the purpose of simplifying the assembling process of the electric vehicle controller is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric vehicles, and more specifically, to a welding structure of a power column of an electric vehicle controller. Background Art

[0002] The assembly process of electric vehicle controllers tends to be simplified. One of the methods is to weld the power column and the aluminum substrate together. With the development of SMT patch technology, there is now a connection method that uses reflow soldering to directly weld the power column to the aluminum substrate.

[0003] In the patent document with announcement number CN220528323U, an electric vehicle controller structure is proposed, the device includes a shell, a control board is arranged below the shell, an aluminum substrate is arranged below the control board, a radiator is arranged below the aluminum substrate, a shell rib is arranged on one side of the shell, a sealing groove is arranged on the radiator, a sealing ring is arranged in the sealing groove, the sealing ring is matched with the sealing groove, the shell rib is used in conjunction with the sealing ring, a fastening mechanism is arranged above the radiator; a support column is arranged on the radiator, and the aluminum substrate is arranged above the radiator through a plurality of the support columns; a power column is arranged on the control board, and the power column is welded to the control board; it is characterized in that: a magnetic ring assembly is arranged on the control board, and the magnetic ring assembly is fixed to the control board by pressing the shell; the magnetic ring assembly has three supporting legs, and the supporting legs of the magnetic ring assembly are relatively long. The electric vehicle controller provided by the utility model is connected and fastened to each component, the structure is stable and compact, the protection performance is improved, the assembly process and assembly materials are reduced, the cost is reduced, and it is convenient for mass production.

[0004] However, the power column in the device is directly soldered to the aluminum substrate through the reflow soldering technology, and no gas guide components are provided. When the reflow soldering technology is applied to chip components, the void rate of the welding surface is controllable due to the small welding area of ​​the components. However, when it is applied to the welding between the power column and the aluminum substrate, the welding area of ​​the power column is multiplied compared with the welding surface of the component. The gas in the solder paste is more likely to accumulate on the welding surface and cannot be discharged, resulting in a large number of voids. This poor welding phenomenon will seriously affect the connection strength between the power column and the aluminum substrate, resulting in cracks at the connection between the welding surface and the aluminum substrate when the power column is subjected to a large torque, and ultimately causing damage to the controller. Utility Model Content

[0005] 1. Technical issues to be resolved

[0006] In view of the problems existing in the prior art, the utility model provides a welding structure for the power column of an electric vehicle controller to solve the technical problem that the power column mentioned in the background technology is directly welded on an aluminum substrate. This welding method has the disadvantages of too many voids on the welding surface and weak welding, resulting in the power column being unable to withstand a large torque.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a welding structure of a power column of an electric vehicle controller, comprising an aluminum substrate and a power column, one end of the power column is fixedly connected with a welding ring, one side of the welding ring is recessed inward to form a plurality of air guide grooves.

[0009] The utility model is further configured that a plurality of the gas guide grooves are staggeredly arranged on one side of the welding ring to facilitate the discharge of gas in the solder paste.

[0010] The utility model is further configured that the welding ring is provided with an exhaust hole to facilitate the centralized exhaust of the gas in the air guide groove.

[0011] The utility model is further configured that the welding ring and the aluminum substrate are connected by welding with solder paste, which facilitates welding of the welding ring and the aluminum substrate.

[0012] The utility model is further configured such that the thickness of the solder paste is 0.2 mm, so as to ensure the quality of welding.

[0013] The utility model is further configured that the material of the power column and the welding ring is easy-to-solder brass, which is a special type of brass, and its characteristic is that an appropriate amount of tin is added to traditional brass to improve its solderability.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a welding structure of the power column of an electric vehicle controller, which has the following beneficial effects:

[0016] The utility model changes the shape of the welding surface of the welding ring on the power column so that the evaporated gas in the solder paste during the reflow soldering process can be discharged in time, thereby reducing the void rate and greatly improving the welding quality between the power column and the aluminum substrate, so that the power column and the aluminum substrate are integrated, and finally the purpose of simplifying the assembly process of the electric vehicle controller is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a welding structure of a power column of an electric vehicle controller;

[0018] Figure 2 This is a schematic diagram of part of the structure of the power column when it is not welded;

[0019] In the figure: 1, aluminum substrate; 2, power column; 21, air guide groove; 22, exhaust hole; 23, welding ring. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0022] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0023] See also Figure 1-2 A welding structure of a power column of an electric vehicle controller comprises an aluminum substrate 1 and a power column 2, wherein a welding ring 23 is fixedly connected to one end of the power column 2, and one side of the welding ring 23 is recessed inward to form a plurality of air guide grooves 21, and the plurality of air guide grooves 21 are staggeredly arranged on one side of the welding ring 23, and an exhaust hole 22 is provided on the welding ring 23. The welding ring 23 is connected to the aluminum substrate 1 by soldering with solder paste, and the thickness of the solder paste is 0.2 mm. The material of the power column 2 and the welding ring 23 is brass that is easy to solder.

[0024] Specifically, a plurality of staggered gas guide grooves 21 are arranged on the welding ring 23, which divide the larger welding surface into small welding surfaces with similar areas to the components. During the welding process, after the gas in the solder paste evaporates, it will reach the gas guide grooves 21 through a very short path and will be more easily discharged. At the same time, an exhaust hole 22 is arranged at the axis of the welding ring 23. When the aluminum substrate 1 carries the power column 2 and enters the reflow soldering heating zone, the gas in the solder paste begins to evaporate. At this time, the gas will overflow from the welding surface into the gas guide grooves 21 with less resistance. As the solder paste softens and adheres to the welding surface of the welding ring 23, the gas will gather from the plurality of gas guide grooves 21 to the exhaust holes 22 and then be discharged in a centralized manner. Most of the gas in the welding surface is discharged, and the void rate is greatly reduced. Then the aluminum substrate 1 enters the high temperature zone, and the solder in the solder paste is converted into liquid, infiltrating and filling the space of several air guide grooves 21. Finally, the solder will form a concave-convex meshing with the welding surface of the welding ring 23 and the air guide groove 21, thereby welding the power column 2 to the aluminum substrate 1, further improving the welding strength of the power column 2.

[0025] To sum up, when the overall equipment is in use:

[0026] When the power column 2 and the aluminum substrate 1 are being welded, several staggered air guide grooves 21 are provided on the welding ring 23 to divide the larger welding surface into small welding surfaces with a similar area to the components. During the welding process, the gas in the solder paste evaporates and reaches the air guide grooves 21 through a very short path, which makes it easier to discharge. At the same time, an exhaust hole 22 is provided at the axis of the welding ring 23. When the aluminum substrate 1 carries the power column 2 into the reflow heating zone, the gas in the solder paste begins to evaporate. At this time, the gas will overflow from the welding surface into the air guide grooves 21 with less resistance. As the solder paste softens and adheres to the welding surface of the welding ring 23, the gas will gather from the several air guide grooves 21 to the exhaust holes 22 and then be discharged in a centralized manner. Most of the gas in the welding surface is discharged, and the void rate is greatly reduced. Then the aluminum substrate 1 enters the high temperature zone, and the solder in the solder paste is converted into liquid, infiltrating and filling the space of several air guide grooves 21. Finally, the solder will form a concave-convex meshing with the welding surface of the welding ring 23 and the air guide groove 21, thereby welding the power column 2 to the aluminum substrate 1, further improving the welding strength of the power column 2.

[0027] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A welding structure of a power column of an electric vehicle controller, comprising an aluminum substrate (1) and a power column (2), characterized in that: A welding ring (23) is fixedly connected to one end of the power column (2), and one side of the welding ring (23) is recessed inwards to form a plurality of air guide grooves (21).

2. The welding structure of a power column (2) of an electric vehicle controller according to claim 1 is characterized in that: The plurality of air guide grooves (21) are arranged in a staggered manner on one side of the welding ring (23).

3. The welding structure of a power column (2) of an electric vehicle controller according to claim 2 is characterized in that: The welding ring (23) is provided with an exhaust hole (22).

4. The welding structure of a power column (2) of an electric vehicle controller according to claim 3 is characterized in that: The welding ring (23) is connected to the aluminum substrate (1) by welding with solder paste.

5. The welding structure of a power column (2) of an electric vehicle controller according to claim 4 is characterized in that: The thickness of the solder paste is 0.2 mm.

6. The welding structure of a power column (2) of an electric vehicle controller according to claim 5, characterized in that: The power column (2) and the welding ring (23) are made of brass that is easy to solder.

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